Endless belt



C. C. GATES.

yENIJUESS BELT. APPLICATION FILED MAR. I8. Isls,

Patnted Dec. 20,

IIIIIIIII S14/vanta ha/s 'aifs. 774,

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C. C. GATES.

ENDLESS BELT.

APPLICATION rILED MAR. IU, l9l9. 1,400,539. Patented Dev. 20, 1921.

2 EEEE TS- S H E E T 2 1M if ffl M IUI m UNITED STATES CHARLES 0. GAM, 0l' Umm UOLOBADO.

ENDLESB BELT.

Bpeclcation of Letters Patent.

Patented Dec. 250, 1921.

Applition illed March 18, 1019. Serill N0. 288,885.

To all whom 'it ma concern:

Be it known that CHARLES C. GATES, a citizen of the UnitedStates, residing at the city and county of Denver and State of Colorado, have invented certain new and useful Improvements in Endless Belts; and I do declare the followin to be a full, clear, and exact description cfg the invention, suchas will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawin s and to the characters of reference markedg thereon, which form a part of this specification.

y invention relates to improvements in endless belts in which rubberized cords, or other suitable material, constitutes the structural element, or the element which gives strength or backbone to the belt, while the wearing feature of the belt consists of rubberized fabric and rubberor rubber compound, as hereinafter more In the drawin I have illustrated a suitable apparatus or manufacturing belts of this character. In this drawing:

Figure 1 is a section taken on the line 1, Fig. 3, through a battery or series of circular elements connected to form an approximately cylindrical member containing V- sha ed cavities for determinin the shape of the elt, shown on a larger scale.

Fig. 2 is ari-,elevation shown on a smaller scale, showing 'the said member mounted to rotate, as is required in manufacturing these belts. i

Fig. 3 is an end elevation of the same, or a view looking in the direction of arrow 3 Fig. 4 is a side elevation of one of the belts.

Fig. 5 is a section of the same taken on the line 5, Fig. 4.

Fig. 6 illustrates sheet of fabric emplo ed in the manu acture of these belts, andY whose warp andv Woof are arranged dia onally to the length of the belt.

ig. 7 is a view similar to Fig. 1, but showing, except lin one instance, the belts completed.

Fig. 8 shows the cylindrical belt member broken between its extremities and ready to be placed in the vulcanizer. l1`his is a section taken on the line 8, Fig. 9.

Fig. 9 is an end elevation of the cylindrical member with the outer casin applied preparatory to vulcanizing the be ts which fully described.

gave been formed on the cylindrical mem- The same reference characters indicate the same parts in all the views.

Let the numeral 5 designate cach of anumber of circular members which are mounted on a shaft, 6, and connected by a stop, 7, near one end of the shaft, and a nut, 8, at the opposite end, the said members being inteilocked by means of lugs, 9, formed thereon, and entering recesses, shape, formed in the adjacent members. The peripheries of the members 5 are so fashioned that the cylindrical structure composed of a series of these members contains a number of circular V-shaped cavities, 12,

art of one of which is formed in each memer 5, so that after the formation of the belts is completed, the latter may be removed from the cylindrical structure by separating the members 5 by simply unscrewin the nut 8 and slipping` these members o the Shaft;`

Assuming that a battery of the elements 5 is mounted'on the shaft, 6, and that the extremities, 13, of this sha ft, which are polygonal in shape, are inserted in sockets of counterpart sliape,formed in journals, 14, supported by uprights, 15, the cylindrical member or structure will be rotatably mounted and may be connected with any suitable power, as a line shaft, through the medium of a pulley, 16, applied to one of these journals. As soon as this element is mounted, one or more sheets of rubberized fabric, whose woven element 17 has its warp and woof extending at oblique an les to the circumference of the drum or cy indrical member, will be applied to the drum, which ma be rotated for the purpose, during which the said sheet or sheets of rubberized fabric will be pressed into the circular V-shaped 10, of counterpart cavities, l2, of the drum, this rubberized fabric being indicated in the drawing by the numeral 18the direction of its warp and woef bein indicated by the small areas of shading in ig. 2, and on the inner circumference of the belt in Fig. 5. When this rubberized fabric is applied to the drum, as 'ust explained, it will extend beyond the en cavities and between the intermediate cavities. One or more layers, 19, of rubberized fabric may then be placed in the bottom of ,each groove and in contact with the initial layer or layers, after which one or more cords, 20, may be placed within the cavity outside-of the fabric layers,

19, these cord convolutions, one or more, being arallel with the len h of the cavity an consequently paral el with the length of the belt 21 when the latter is completed.

One method of applying the cords 20 to the drum is illustrated in suming that the drum is rotated, one end of the cord must be placed in contact with the outer fabric layer, 19, and as the drum is rotated, the pro er number 'of convolutions will soon be p aced in the rst V-shaped cavit and as soon as this is done, the cord will crossed over to the next cavit as indicated at 2 2; and this operation wil be continued until all the V-shaped cavities are supplied with one or more convolutions of the cord. As soon as this is done, the fabric and the dia onally arranged portions, 22, of the-cord will be cut midway between the intermediate cavities by inserting knives in such position that their points will enter small circumferential rooves, 23, formed in the drum elements. s soon as these cuts are made, the exposed ends of the cords will be properly placed in the cavities, after which the portions 24 of the rubberized fabric, which are in contact with the outer surface of the drum, will be folded into the cavities so that therewill be two or more layers of this fabric outside of the cord portion, or backbone, of the belt. Layers, 25, of rubber compound may then be vplaced in the outer portions of the said cavities, as best illustrated in Figs. T and 8. A metal casing, 26, will then be applied to the drum, this casing beingpreferablyl composed of a number of members, 27, aving abutting flanges connected by bolts 28 or other suitable fastening devices. The size of this metal casing is such that there is a slight s ace-say one-sixty-fourth of an inch in epth, a proximately-betyveen the casing and the rum, to permit any excess of rubber compound to overflow into the rooves 23 during the operation of vulcanization.

' canizer, the casing As soon as the vulcanizing process is complete,

the drum is removed from the vul- 26 removed from the drum, and the members 5 detached from the shaft 6 in order to remove the belts from the rum.

In Fig. 8 I have illustrated suitable means for handling the drum for the purpose of transferring it to the vulcanizer and for removin stood, owever, that any suitable means to accomplish this purpose may be employed.

Furthermore, in order to detach the drum from the stationar structure illustrated in Fig. 2, I may emp oy a hand lever, 29, fulcrumed at 30 and pivotally connected as shown at 31 with nais, 14. lever, the

one end of one of the jour- By properly manipulating this journal may be moved axial y sufig. 2, where, as-

it therefrom. It should be under-` ficientl to disconnect its socket extremit from t e adjacent end of the shaft 6, an also far enough to `allow the drum to be shifted endwise suiliciently to disengage its shaft from the socket extremity of the other journal.

It should be understood that the object of so applying the rubberized fabric to the grooves of the drum that the warp and woof of the fabric shall form oblique an les to the direction of the length of the be t is to rive the latter a limited degree of elasticity eyond that portion of the belt which may be termed its neutral axis, to permit the flexing of the belt freely when bending over a pul ey and which flexing will not in any way in]ure the material of the belt.

Instead of cords, I may employ rubberized woven fabric in which one set of threads extends in the direction of the length of the belt, since this element of the belt will then become substantially nonelastic and will perform virtually the saine function as the convolution or convolutions of cord. This element of the belt, whether composed of cord or fabric, will form the neutral axis of the belt, or the portion which does not stretch when the belt is in use. It will be understood that when the belt is passing around a small pulley, its outer portion beyond the neutral axis is stretched to some extent, but owing to the fact that the warp and Woof of the woven fabric in this portion of the belt form oblique angles to the length of the belt, this portion of the belt is more flexible and more elastic and will not be subject to any injurious stress or tension (hiring the use of the belt, and the latter, due to this fact, Will wear longer because any material which is not stressed will better resist abrasion and general wear durin the performance of its function.

hile the outer portion of the belt, due to the employment of woven rubberized fabric whose War and woof form oblique angles to its lengt is permitted while passing around a small pulley to yield readily without placing the belt under injurious stress or strain, the inner portion of the belt beyond the neutral axis is correspondingly compressed, this compression bein considerable by reason of the fact that the inner part -of the belt is also composed of rubberized 'grip the` adjacent walls of the grooved pulley more tightly,

of slipping.

I claim: 1. An endless vulcanized V-shaped belt thus pre venting the possibility having rubberized cord embedded thereinand lying substantially parallel with the length of the belt, the incllned sides and the inner narrow surface of the belt being composed of rubberized woven fabric whose warp and Woof form oblique angles to the length of the belt.

2. An endless vulcanized V-shaped belt having rubberized cord embedded therein and lying substantially arallel with the length of the belt the inclined sides and the inner narrow surface of the belt being composed of rubberized woven fabric Whose War and Woof form oblique angles to the iengtli of the belt, the belt also havin a number 0f layers of woven fabric locate between the cord and the inner narrow face of the belt.

3. An endless vulcanized V-shaped belt having rubberized cord embedded therein and lying substantially parallel with the length of the belt, the inclined sides and the inner narrow surface of the belt being composed of rubberized woven fabric Whose warp and woof form oblique angles to the length of the belt, the belt also having a number of layers of Woven fabric whose warp and Woof are diagonal to the length of the belt, located between the cord and the inner narrow face of the belt.

4. An endless vulcanized V-shaped belt having rubberized cord embedded therein.

and lying substantially parallel with the length of the belt, the inclined sides and the inner narrow surface of the belt being composed of rubberized woven fabric whose warp and woof form oblique angles to the length of the belt, the belt also having a number of layers of woven fabric located between the cord and the inner narrow face. of the belt, the outer face of the belt having a layer of rubberized com ound.`

5. An endless vulcanized V-shaped belt contact surface of the belt having a layer of rubberized compound.

(3. A vulcanized V-Shared belt whose opposite inclined side Wal s are composed of rubberized woven fabric, whose warp and Woof form oblique angles to the length of the belt.

7. An endless vulcanized belt, having a rubberized convoluted cord embedded therein and surrounded by rubberized woven fabric whose warp and Woof are arranged at oblique angles to the length of the belt, its outer non-contact surface being composed of a layer of rubber compound.

8. An endless vulcanized V-shaped belt having substantially non-elastic cords at its neutral axis and whose opposite inclined side walls are composed of rubberized woven fabric whose warp and woof are diagonal to the length of the belt.

9. An endless vulcanized belt having rubberized cord embedded therein and lying substantially parallel with the length of the belt, the sides and the inner surface of the belt being composed of rubberized Woven fabric whose warp and Woof form oblique anvles to the lenoth of the belt.

fn testimony Wliereof I ailix my signature.

CHARLES C. GATES.

DIBCLAIM-ER 1,400,539.-Chara C'. Gates, Denver, Colo. Ewnuzss BELT. Patent, dated December 20, 1921. Disolamer filed January 19, 1931, by the assignee, The Gata Rubber Company.

Hereby eners its disclaimer whereby said olaims 7 and 9 are limited to a belt which, when m use, engages the adjacent xlined'sdes of a. grooved pulley, the belt notI tfouchmg the bottom of the groove, so that the belt wedges in thefulley, or to s side-driving belt. as distinguished from a. et, fece-driving belt, an any broader memmg or interpretation of seid chimsjs hereby dlsclnimed.

[mal Gazette Fdmary 10, 1981.] 

